I needed some human contact a few years back so I spent three years running a handyman business.  I didn't make very much, but I did have challenges (which I like) and a lot of interaction with people from all spectrums.  I was in mansions and in the worst parts of Harrisburg and everything in between.  I did electrical, plumbing, drywall, wood work, flooring, and pretty much anything I thought I was capable of handling on my own.  If I wasn't confident that I could do it, I turned down the job - including one that would have netted me about $40K.  
In one case, a woman had a "broken screen door".  She was an elderly woman in a very small house.  All it needed was a screw to hold the return bar in place.  I had one that fit and it took about five minutes.  I refused to accept money from her and she wanted to give me a bunch of peaches that she had peeled and sliced.  I graciously refused those as well.  Sometimes it just isn't right to take money or anything else for doing something.  That's the way humans should be.